Still



S. E- OLIVER.

STILL.

APPLICATIQN FILED MAY 6, 1920- II 1 lllll lll I Patented June 13, 1922.

STATES ATENT OFFICE.

SAMUEL E. OLIVER, OF VANCOUVER, BRITISH COLUMBIA, CANADA.

STILL.

Application filed May 6,

signed for the distillation of turpentine from oleoresin, it is applicable to any similar distillation process.

In such distillation it is usual to conduct the volatile vapours from the vessel in which they are generated to axworm or the like where they are condensed.

Under such conditions a considerable portion of the vapours condense on the inner side of the cover, which collects and delivers the vapours to the condenser, and the distilled liquid trickles down the sides of the cover into the vessel from which it was evaporated, and requires to be re-evaporated, more than once before it is finally delivered to the worm or other condensing provision.

This re-evaporation not only involves a considerable loss of heat but has a deteriorating elfect on the quality of the distillate.

These objections are overcome in the still cover, which is the particular subject of this application, by condensing and collecting the distillate in the cover of the vessel from which the vapours are generated, whereby practically no heat is wasted and the quality of the distillate is greatly improved.

The invention is fully set forth in the following specification, reference being made to the drawings by which it is accompanied, in which:

Fig. 1 is a longitudinal section of a still having my improved condensing cover and Fig. 2 is a vertical cross section of the same.

In these drawings 2 represents the con tainer in which is the material from which the volatile constituents are to be distilled by the application of heat, and 3 represents the cover for the same. The space within this cover is usually connected to a separate condenser by a pipe connection shown in dot and dash lines at 4.

Instead of having this pipe connection to the condenser, or as supplementing the same, I make the cover 3 of thin sheet copper or other good heat conducting metal with sides Specification of Letters Patent. Patented June 13, 1922.

1920; Serial No. 379,352.

sloping downward from a medial ridge at an angle of approximately sixty degrees (6.0 and along the loweredgesa-nd around the ends of'this cover 3 where 1t joints on the container 2','is a relatively small channel 5 adapted to receive the liquid which condenses on the inner side of the cover and trickles down the slope.

At one end of the cover this channel b drains into a duct 6' through the cover into a removable receptacle provided for it. If i a worm is used, connected at 4, the duct 6 may deliver into the worm.

Over the ridge of the cover 2 water isdelivered from sprays 9- or by ot'her approved means, by which the cover is kept cool and rapid condensation is ensured. This water is carried away by a channel 7 around the outside of the lower edge of 2 and a delivery pipe 8.

In a still with a coveras described, the volatile vapours are condensed on the inner surface of the cover 2, which surface is cooled by the water sprayed on and running down the outer surface of the same, and the condensed distillate trickles down the inner slope of the cover and is diverted by the channel-5 to the delivery duct 6. The distillate in the channel 5 is maintained cool by the water in the outer channel 7.

None of the condensed distillate is thus allowed to return to the container 2 to be re-evaporated, so that the heat of such reevaporation is conserved. Not only is this heat saved, but the distilled product is of higher grade than is obtainable where constant re-evaporation prevails, which to a very considerable extent is unavoidable in all existing stills.

Having now particularly described my in vention, I hereby declare that what I claim as new and desire to be protected in by Letters Patent, is:

1. In a still, a cover, said cover comprising a dome-like body having a distillate collection gutter at the lower end of said body within the cover and a cooling liquid collecting gutter at the lower end of said body and outside of the same, ofitake ducts for delivering the material from said gutters, and means for delivering a spray of cooling. medium at the top of said body on the peak thereof.

2. In a still, a removable cover comprising a peaked body of inverted V-shape in cross section, the walls of which body are smooth edge gutter inside of said body around the lowerv and uninterrupted, a shallow collection gutter outside of said body around the lower of the same and a shallow collection edge of the same, ducts for conveying the material from said collection gutters, and means for deliverlnga spray of cooling me- .c the same and forming a flange to rest on the upper edge of said vessel, an ofitake duct tor said gutter, at the lower from said last named gutter, and means for delivering a spray of cooling medium over the peak line of said cover.

l. In a stillihaving a vessel for receiving peak, the end and an internal collection gutter end of said body and a duct,

the material to be distilled, a removable cover for said vessel comprising a shallow gutter adapted to rest on the edge of said vessel, upwardly projecting smooth walls converging toward one another to a peak line and extending upwardly from said gutter, means for delivering a spray of cooling water over said cover, a duct for conveying the water Tom said gutter, and a distillate collecting gutter within said cover and a duct for conveying the distillate from said last named gutter. v

In axstill, the combination with a vessel from whichthe material to be distilled is evaporated, o'fa cover therefor the edges of which are lower than the intermediate portion, said cover having a collecting channel around its inner lower edge, a duct delivering therefrom, a collecting channel around the outer side of the lower edge, a duct delivering therefrom, and means for spraying a cooling medium on the outer surface of the cover. a

In testimony whereof I aflix 1n signature.

. l SAMUEL E. LIVER. 

